2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.protocol.pcep.ietf.stateful;
10 import static com.google.common.base.Preconditions.checkArgument;
12 import io.netty.buffer.ByteBuf;
13 import io.netty.buffer.Unpooled;
14 import java.util.ArrayList;
15 import java.util.List;
16 import java.util.Optional;
17 import java.util.Queue;
18 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
19 import org.opendaylight.protocol.pcep.spi.AbstractMessageParser;
20 import org.opendaylight.protocol.pcep.spi.MessageUtil;
21 import org.opendaylight.protocol.pcep.spi.ObjectRegistry;
22 import org.opendaylight.protocol.pcep.spi.PCEPErrors;
23 import org.opendaylight.protocol.pcep.spi.PSTUtil;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.Pcrpt;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.PcrptBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.object.Lsp;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.pcrpt.message.PcrptMessageBuilder;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.pcrpt.message.pcrpt.message.Reports;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.pcrpt.message.pcrpt.message.ReportsBuilder;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.pcrpt.message.pcrpt.message.reports.Path;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.pcrpt.message.pcrpt.message.reports.PathBuilder;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.srp.object.Srp;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.srp.object.srp.Tlvs;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Message;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Object;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.bandwidth.object.Bandwidth;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.explicit.route.object.Ero;
38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.include.route.object.Iro;
39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.lsp.attributes.Metrics;
40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.lsp.attributes.MetricsBuilder;
41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.lspa.object.Lspa;
42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.metric.object.Metric;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.reported.route.object.Rro;
46 * Parser for {@link Pcrpt}.
48 public class StatefulPCReportMessageParser extends AbstractMessageParser {
50 public static final int TYPE = 10;
52 public StatefulPCReportMessageParser(final ObjectRegistry registry) {
57 public void serializeMessage(final Message message, final ByteBuf out) {
58 checkArgument(message instanceof Pcrpt, "Wrong instance of Message. Passed instance of %s. Need Pcrpt.",
60 final Pcrpt msg = (Pcrpt) message;
61 final List<Reports> reports = msg.getPcrptMessage().getReports();
62 final ByteBuf buffer = Unpooled.buffer();
63 for (final Reports report : reports) {
64 serializeReport(report, buffer);
66 MessageUtil.formatMessage(TYPE, buffer, out);
69 private void serializeReport(final Reports report, final ByteBuf buffer) {
70 if (report.getSrp() != null) {
71 serializeObject(report.getSrp(), buffer);
73 serializeObject(report.getLsp(), buffer);
74 final Path p = report.getPath();
76 serializeObject(p.getEro(), buffer);
77 serializeObject(p.getLspa(), buffer);
78 serializeObject(p.getBandwidth(), buffer);
79 serializeObject(p.getReoptimizationBandwidth(), buffer);
80 for (final Metrics m : p.nonnullMetrics()) {
81 serializeObject(m.getMetric(), buffer);
83 serializeObject(p.getIro(), buffer);
84 serializeObject(p.getRro(), buffer);
89 public Message validate(final Queue<Object> objects, final List<Message> errors) throws PCEPDeserializerException {
90 checkArgument(objects != null, "Passed list can't be null.");
91 if (objects.isEmpty()) {
92 throw new PCEPDeserializerException("Pcrpt message cannot be empty.");
95 final var reports = new ArrayList<Reports>();
96 while (!objects.isEmpty()) {
97 final Reports report = getValidReports(objects, errors);
102 return new PcrptBuilder().setPcrptMessage(new PcrptMessageBuilder().setReports(reports).build()).build();
105 protected Reports getValidReports(final Queue<Object> objects, final List<Message> errors) {
106 final ReportsBuilder builder = new ReportsBuilder();
108 boolean lspViaSR = false;
109 Object object = objects.remove();
110 if (object instanceof Srp srp) {
111 final Tlvs tlvs = srp.getTlvs();
113 lspViaSR = PSTUtil.isDefaultPST(tlvs.getPathSetupType());
116 object = objects.poll();
119 if (validateLsp(object, lspViaSR, errors, builder)) {
120 if (!objects.isEmpty()) {
121 if (!validatePath(objects, errors, builder)) {
126 return builder.build();
131 private static boolean validateLsp(final Object object, final boolean lspViaSR, final List<Message> errors,
132 final ReportsBuilder builder) {
133 if (object instanceof Lsp lsp) {
134 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp
135 .object.lsp.Tlvs tlvs = lsp.getTlvs();
136 if (!lspViaSR && lsp.getPlspId().getValue().toJava() != 0
137 && (tlvs == null || tlvs.getLspIdentifiers() == null)) {
138 final Message errorMsg = createErrorMsg(PCEPErrors.LSP_IDENTIFIERS_TLV_MISSING, Optional.empty());
139 errors.add(errorMsg);
147 errors.add(createErrorMsg(PCEPErrors.LSP_MISSING, Optional.empty()));
151 private static boolean validatePath(final Queue<Object> objects, final List<Message> errors,
152 final ReportsBuilder builder) {
153 final PathBuilder pBuilder = new PathBuilder();
154 Object object = objects.remove();
155 if (object instanceof Ero ero) {
156 pBuilder.setEro(ero);
158 errors.add(createErrorMsg(PCEPErrors.ERO_MISSING, Optional.empty()));
161 parsePath(objects, pBuilder);
162 builder.setPath(pBuilder.build());
166 private static void parsePath(final Queue<Object> objects, final PathBuilder builder) {
167 final List<Metrics> pathMetrics = new ArrayList<>();
168 State state = State.INIT;
170 for (Object obj = objects.peek(); obj != null; obj = objects.peek()) {
171 state = insertObject(state, obj, builder, pathMetrics);
172 if (state == State.END) {
178 if (!pathMetrics.isEmpty()) {
179 builder.setMetrics(pathMetrics);
184 * Determine the type of Object and insert it in the PathBuilder.
186 * <p>This method uses a state machine to check that Objects are seen only once and to speed up the browsing.
187 * However, the order of Object in the PcReport has changed between old draft version and final RFC8231.
188 * Indeed, as per RFC8231, the PcReport is composed of: ["SRP"], "LSP", "path"
189 * where "path" = "intended-path", ["actual-attribute-list", "actual-path"], "intended-attribute-list"
190 * and where "intended-path" = ERO, "actual-attribute-list" = BANDWIDTH, METRICS, "actual-path" = RRO
191 * and "intended-attribute-list" = LSPA, BANDWIDTH, METRICS, IRO
192 * In old draft version, "intended-attribute-list" was placed just right after the "intended-path".
193 * Thus, the state machine should be flexible enough to accommodate to PCCs that continue to use old draft and
194 * PCCs that are compliant to the RFC8231.</p>
196 * @param state Current State of the state machine
197 * @param obj Object to be identify and added to Path Builder
198 * @param builder Path Builder to be fill with the Object
199 * @param pathMetrics List of Metrics to be fill with Object when it is a Metrics
201 * @return New State of the state machine
203 private static State insertObject(final State state, final Object obj, final PathBuilder builder,
204 final List<Metrics> pathMetrics) {
207 if (obj instanceof Lspa lspa) {
208 builder.setLspa(lspa);
209 return State.LSPA_IN;
213 // Check presence for <intended-attribute-list> i.e LSPA, Bandwidth, Metrics, IRO ... as per old draft
214 if (obj instanceof Bandwidth bandwidth) {
215 builder.setBandwidth(bandwidth);
216 return State.LSPA_IN;
219 instanceof org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109
220 .reoptimization.bandwidth.object.ReoptimizationBandwidth reoptBandwidth) {
221 builder.setReoptimizationBandwidth(reoptBandwidth);
222 return State.LSPA_IN;
226 if (obj instanceof Metric metric) {
227 pathMetrics.add(new MetricsBuilder().setMetric(metric).build());
228 return State.BANDWIDTH_IN;
232 if (obj instanceof Iro iro) {
238 if (obj instanceof Rro rro) {
244 // Check presence for <intended-attribute-list> i.e LSPA, Bandwidth, Metrics, IRO ... as per RFC8231
245 if (obj instanceof Lspa lspa) {
246 builder.setLspa(lspa);
247 return State.LSPA_IN;
258 INIT, LSPA_IN, BANDWIDTH_IN, METRIC_IN, IRO_IN, RRO_IN, END